I'm in the same boat as you. 36 and have been playing since Vanilla. Was a progression raider until the tail end of Mists. Went casual because I simply couldnt invest the time I used to anymore. I will stick with retail because there's still plenty I enjoy but I'm sure I'll find myself on a Classic server from time to time reliving some memories. Enjoy the game however you want to play it. This rabid purism is fucking ridiculous.